Seamless steel raj rau qis thiab nruab nrab siab boilers - Gold Sanon International Co., Ltd.

Seamless steel raj rau qis thiab nruab nrab siab boilers

GB 3087 txheem seamless boiler alloy steel yeeb nkab

Seamless Boiler Alloy Steel Yeeb Nkab Nrog IBR Certification Tsawg Siab Nruab Nrab Siab Rau Is Nrias teb Kev Lag Luam Kub Muag

GB / T 3087-2008: 10 # steel, 20 # steel

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